Auxilia shields what options are there?

[Folkert van Wijk]

Thanks Nerva your shield also looks great, interesting to see that a lot of people go for the more "native" green...

And thanks again Paullus for the page with the auxiliary shields...

I have a sort of categorized them. The now top ones look pretty Celtic to me, (compare them to what is believed to be Celtic shields on the arch of orange), I ques their difficult to tel from Celtic/Germanic enemy shields...

the first two from the 3st row even do show some kind of rudimentary wooden spine idea in there painting...

Then I circled two things that I don't know what it is or resembles...
looks a kind of pelta shape, Looks like something that would be cool to have as metal attachment.